What happened
The pilot and his copilot were conducting a flight to a private ranch strip. The pilot reported that the approach was normal, although high temperatures and ground effect caused the aircraft to float slightly beyond the intended touchdown point. Upon landing on the soft field surface, the pilot applied the brakes lightly. This action caused the aircraft to nose over. The copilot stated that the aircraft skidded and ended up upside down.
The investigation
In an interview conducted shortly after the accident, the pilot indicated that the aircraft had recently been modified with Cleveland brakes. He noted that he was not completely accustomed to the new braking system. Environmental conditions at the time included calm winds, a temperature of 74 degrees Fahrenheit, and a field elevation of approximately 2800 feet.
Findings
The combination of high density altitude, ground effect, and unfamiliarity with the modified brake system contributed to the accident. The soft runway surface exacerbated the nose-over tendency when braking was applied.